Keyton, Joann, author
Mc Graw Hill, 2015
Buku Teks
Browne, M. Neil, author
Prentice-Hall, 2001
Buku Teks
Peter A. French, Howard Wettstein.
Wiley Blackwell, 2014
Buku Teks
Cheshire
Ray Aitchison, 1974
Buku Teks
Daza, Ricardo
Brkhauser, 2000
Buku Teks